Vehicle-spring.



12.. IS. TRUE. v VEHICLE SPRING, urmoulon FILED JULY l'sf 1999;

WH'NESSE? $21255.

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Patented June 118,1912

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1,029,730, Patented June 18,1912.

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Q41 WHNESSES:

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HOLLAND S. TROTT, 0F DENVER, COLORADO.

VEHICLE-SPRING.

Specification of Letters Patent. Patented June 18, 1912.

Application filed July 19, 1909.. .Scrial No; 508,415.

To all whom it may concern:

its object 'is to provide an elastic contrivance which, when interposed between a vehicle frame and its axle, will, with equal effect absorb shocks directed vertically, horizontally or obliquely upon the latter when the wheels mounted thereon collide with obstructions on the road over which the vehicle is propelled. My improved spring will furthermore counteract the effect of the impact on the vehicle in case of a collision and moderate the pitching or rolling of the vehicle body.

Myinvention consists to this'end. in its preferred form, in the provision of a compound spring, one member of which absorbs vertically directcd shocks while the other counteracts horizontally directed forces. The two members, cooperatively, deaden 'JRYS directed obliquely upon the axle or upon the vehiclebody. When both wheels collide simultaneously with an obstruction on the body are ordinarily line 33 Fig. 2,

road, the wheel axle and the pivotal axle which carries the springs will, by reason of the above described. arrangement, move circularly with relation to each other While, if but one of the Wheels encounters an obstruction, an oblique movement of the wheel axle with respect to the pivotal axles will tend to dissipate the effect of the shock. It will thus be observed that by the use of my compound spring the wheel and fpivotal axles may move resiliently in a rectilinear direction with respect to each other or air cularly about each other and thus absorb all shocks to which. the wheels or the vehicle subject.

In the accompanying drawings, Figure 1, represents a plan view of one of the wheels. the therewith connected axle, the adjacent portion of the frame and the interposed comound spring, Fig. 2,a side elevation thereof. rig. 3, a vertical section taken along the Fig. 4. a view similar to Fig. 2, drawn to a diminished scale, to .show\ the, direction of the shocks to which the wheels may be subjected without detrimental effectupon the vehicle body, by the interpositionv of my improved springs, Figs. 5 and 6 respectively front and side cleva tionsof a modified construction of my iii-- yention and Fig. 7 a View similar to Fig. 2, in which the vehicle frame is disposed above the axle which carries the wheels.

My improved compound spring consists in its. preferred form as stated liereinbefore, of two coiiperative members 5 andG, one of which elliptic while the other ispreferably rectilinear and like the first one, composed of a plurality of blades of varying lengths. The elliptic spring 5 is super1m-.

posed at 'its central portion, upon an QX- t'remity of the rectilinear member 6 and the two parts are rigidly connected to each other and to a subjaccnt bearing plate 8, by means of two clevises 9.

. The plate above referred to, has in its central enlarged portion, atransverse bore 10, designed for the reception-' of a. pivot axle 12 forming part of a bracket- 13 which is rigidly secured to the .vehicle'frame 14:, by means of rivets 15 or analogous fastening devices. A nut 10 nponthe correspondingly threaded extremity of the pin 12 is applied to preventlateral displacement of the bearing plate and the therewith connected spring. l 1 The vehicle axle 16 at the extremities of which the wheels 17, are rotatably mounted, issecured upon the upper surface of the elliptic member 5 by means of a hollow block 18 through which said axle projects and which is secured upon said member by means of clevises 19 the threaded ends of which project through a plate 20 placed below the upper portion of the spring 5, and are secured by nuts 21. A buffer 22 of elastic material is secured to the plate 20 for the purpose of limiting the collapsing movement of the spring 5.

The free extremity of the rectilinear spring 6 is movably suspended from the frame 1 1 by means of a link 24 whose function is to compensate by its oscillatory move-- ment, for the variations in the distance between the ends of the spring while it is deflected. 4

A shock'directed upon tical direction (arrowa by the elliptic member 5 of the compound the wheel in a verspring without materially affecting the Fig. 4) is absorbed other member 6 forces acting horizontally in I the direction of. the arrow 0 are counteracted bydeflection of the rectilinear spring 6,

while jars a diagonal or oblique direction between thevertical and the horizontal, as

-indicatedby the arrow d, are deadened by simultaneous action of the two members of the compound spring. The actions ofthe "springs as above described are accompanied by a movement of either thewheel axle or I the pivotal axlg or both'of them in-a recti-v 10 linear directiontoward each other vertically or horizontally, or circularly about each ot er and all shocks to which a vehicle is ordinarily subject,are thus effectively-wholly or partially absorbed with the result thata the movements of the vehicle bodyzare renderedequable to an extent which obviates the employment of pneumatic or highly resilient wheel't-i es. i

' a In the construction shown in Figs. 5 and 6, coiled springs 25 and 26 take the place of the two members 5 and 6 shown in the other figures. The pivot pin'27 on the bracket 28, projects in this ,form loosely through a block 29 which is connected to a U shaped element 30 in which the block-31 through which the wheel axle 32 extends, is slidably mounted. The spring 25 is interposed between the two b ocks 29 and 31 and the spring-26 is wound around the outer portion ofthe pin'27 to which it is connected at one' of its ends while its opposite extremity con -nects with the element 30.

Having thus described my invention what I claim-isz- Y a Y 1. The combination with a vehicle frame and a therewith associated wheel axle, of a spring interposed between the same 'and pivotally connected with the frame, said i spring adapted to move, circularly about the pivotal axison the said frame, and anons'upporting alinement spring connected with;

the frame and with thefirst named spring 7 in such a manner that it resiliently opposes the said circularmo'vement 2. The combination 'with agve'hicle' frame and 'atherewith associated wheelaxle, of an interposed spring secured to the latter and pivotally connected with said frame at alinement with'the axle, a normally horifirst named spring at .apoint-intermediate the pivotal axis thereof on the vehicle frame hicle frame.

and a therewith associated wheel axle, of a nected to the frame.

5. The combination with a vehicle frame and axle, of a spring interposed between the vto the vehicle frame, and a non-'supporting alinement spring connected with said vc;" hi cle frame and with the first named sprlng,

oppose anycircular movement of the axle about the pivot. v

signature in presence'of two witnesses.

Witnesses:

G. J. RoLLAnDEr. v M. L GEARY.

a point normally in approximately vertical zontal, rectilinear spring connected with the v and the wheel axle and an oscillatory member movably connecting the outer extremity of the said. rectilinear spring with the-ve- 3; The combination witha vehicle frame:

spring interposed between the same, said 4. The combination with a vehicle frame v attached to the first-named spring and consame, said spring being pivotally connected s'aid last-named spring adapted toresilient'ly In testimony whereof have aflixed my" BOLLAND s. TROTT. 

